<Wesnoth 1.14.1, steam>
I had such a situation that during the game wesnoth crashed. [he just turned off]
I have not been able to start the game since then.
The game "disappears" after verifying cache. I try uninstall game (and turn off comp.) and instal again. Unfortunately it did not help, it still does not start.
I removed all add-on. No error is displayed, just turned off.